./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/cart.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/cart.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85f7d1ed54d862786907cd1b4275170af31fb3969b21d7a2f2e5e352106544af --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:45:59,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:45:59,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:45:59,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:45:59,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:45:59,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:45:59,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:45:59,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:45:59,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:45:59,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:45:59,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:45:59,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:45:59,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:45:59,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:45:59,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:45:59,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:45:59,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:45:59,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:45:59,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:45:59,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:45:59,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:45:59,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:45:59,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:45:59,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:45:59,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:45:59,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:45:59,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:45:59,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:45:59,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:45:59,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:45:59,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:45:59,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:45:59,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:45:59,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:45:59,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:45:59,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:45:59,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:45:59,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:45:59,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:45:59,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:45:59,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:45:59,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:45:59,674 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:45:59,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:45:59,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:45:59,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:45:59,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:45:59,677 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:45:59,677 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:45:59,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:45:59,678 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:45:59,678 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:45:59,679 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:45:59,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:45:59,679 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:45:59,680 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:45:59,680 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:45:59,680 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:45:59,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:45:59,681 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:45:59,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:45:59,682 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:45:59,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:45:59,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:45:59,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:45:59,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:45:59,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:45:59,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:45:59,685 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:45:59,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:45:59,685 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:45:59,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:45:59,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:45:59,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:45:59,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:45:59,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:45:59,687 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:45:59,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:45:59,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:45:59,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:45:59,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:45:59,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:45:59,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:45:59,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f7d1ed54d862786907cd1b4275170af31fb3969b21d7a2f2e5e352106544af [2022-11-25 23:46:00,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:46:00,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:46:00,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:46:00,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:46:00,043 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:46:00,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/heap-data/cart.i [2022-11-25 23:46:03,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:46:03,396 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:46:03,397 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/sv-benchmarks/c/heap-data/cart.i [2022-11-25 23:46:03,408 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/data/a40ad5a64/293fe4f509b14c55a1d2d03f06e21505/FLAGb89d43606 [2022-11-25 23:46:03,426 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/data/a40ad5a64/293fe4f509b14c55a1d2d03f06e21505 [2022-11-25 23:46:03,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:46:03,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:46:03,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:46:03,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:46:03,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:46:03,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:03,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325b7d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03, skipping insertion in model container [2022-11-25 23:46:03,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:03,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:46:03,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:46:03,797 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/sv-benchmarks/c/heap-data/cart.i[23713,23726] [2022-11-25 23:46:03,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:46:03,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:46:03,884 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/sv-benchmarks/c/heap-data/cart.i[23713,23726] [2022-11-25 23:46:03,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:46:03,926 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:46:03,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03 WrapperNode [2022-11-25 23:46:03,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:46:03,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:46:03,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:46:03,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:46:03,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:03,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:03,991 INFO L138 Inliner]: procedures = 121, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-25 23:46:03,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:46:03,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:46:03,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:46:03,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:46:04,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,017 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:46:04,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:46:04,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:46:04,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:46:04,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (1/1) ... [2022-11-25 23:46:04,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:46:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:04,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:46:04,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:46:04,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:46:04,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:46:04,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:46:04,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:46:04,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:46:04,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:46:04,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:46:04,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:46:04,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:46:04,317 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:46:04,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:46:04,577 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:46:04,613 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:46:04,614 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 23:46:04,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:46:04 BoogieIcfgContainer [2022-11-25 23:46:04,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:46:04,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:46:04,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:46:04,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:46:04,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:46:03" (1/3) ... [2022-11-25 23:46:04,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297b4608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:46:04, skipping insertion in model container [2022-11-25 23:46:04,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:46:03" (2/3) ... [2022-11-25 23:46:04,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@297b4608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:46:04, skipping insertion in model container [2022-11-25 23:46:04,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:46:04" (3/3) ... [2022-11-25 23:46:04,627 INFO L112 eAbstractionObserver]: Analyzing ICFG cart.i [2022-11-25 23:46:04,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:46:04,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:46:04,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:46:04,715 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@383d926f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:46:04,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:46:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:46:04,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:04,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:04,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1487606993, now seen corresponding path program 1 times [2022-11-25 23:46:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:04,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391500747] [2022-11-25 23:46:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:04,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:04,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391500747] [2022-11-25 23:46:04,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391500747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:04,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:04,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:46:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211567267] [2022-11-25 23:46:04,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:46:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:46:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:46:04,917 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:04,944 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-25 23:46:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:46:04,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:46:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:04,955 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:46:04,956 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:46:04,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:46:04,963 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:04,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:46:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:46:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:46:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-25 23:46:04,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2022-11-25 23:46:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:04,997 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-25 23:46:04,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-25 23:46:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:46:04,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:04,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:04,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:46:05,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:05,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2098913187, now seen corresponding path program 1 times [2022-11-25 23:46:05,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:05,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529328365] [2022-11-25 23:46:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:05,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:05,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529328365] [2022-11-25 23:46:05,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529328365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:05,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:05,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:46:05,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323037105] [2022-11-25 23:46:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:05,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:46:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:05,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:46:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:46:05,272 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:05,348 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2022-11-25 23:46:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:46:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:46:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:05,350 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:46:05,350 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 23:46:05,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:46:05,352 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:05,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:46:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 23:46:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 23:46:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-25 23:46:05,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2022-11-25 23:46:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:05,358 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-25 23:46:05,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-25 23:46:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:46:05,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:05,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:46:05,360 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash -2087693085, now seen corresponding path program 1 times [2022-11-25 23:46:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288455348] [2022-11-25 23:46:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:05,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:05,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288455348] [2022-11-25 23:46:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288455348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:46:05,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:46:05,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:46:05,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286604447] [2022-11-25 23:46:05,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:46:05,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:46:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:46:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:46:05,573 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:05,636 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-25 23:46:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:46:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:46:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:05,637 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:46:05,637 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:46:05,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:46:05,639 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:05,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:46:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:46:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-11-25 23:46:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-25 23:46:05,677 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2022-11-25 23:46:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:05,677 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-25 23:46:05,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-25 23:46:05,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:46:05,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:05,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:05,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:46:05,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:05,679 INFO L85 PathProgramCache]: Analyzing trace with hash -590793553, now seen corresponding path program 1 times [2022-11-25 23:46:05,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:05,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177231074] [2022-11-25 23:46:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:05,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:06,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177231074] [2022-11-25 23:46:06,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177231074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:06,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344089113] [2022-11-25 23:46:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:06,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:06,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:06,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:46:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:46:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:06,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:07,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-11-25 23:46:07,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:07,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2022-11-25 23:46:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:07,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:46:07,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344089113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:07,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928304264] [2022-11-25 23:46:07,652 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:46:07,653 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:07,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:07,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:07,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:07,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:07,884 INFO L321 Elim1Store]: treesize reduction 44, result has 43.6 percent of original size [2022-11-25 23:46:07,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 121 [2022-11-25 23:46:07,943 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:46:07,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-25 23:46:07,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:07,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:08,035 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:08,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:08,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:08,873 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:08,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:46:09,016 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:09,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:46:09,098 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:09,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:09,204 INFO L321 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2022-11-25 23:46:09,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 267 [2022-11-25 23:46:09,374 INFO L321 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-25 23:46:09,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 277 [2022-11-25 23:46:09,459 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:09,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-25 23:46:09,518 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:46:09,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 23:46:09,581 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:09,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-25 23:46:09,630 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:46:09,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 23:46:14,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:14,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:14,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:14,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:14,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:14,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:14,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:14,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:14,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:14,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:14,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:14,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:14,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:14,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:14,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:14,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:14,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:14,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:15,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '355#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_main_~i~0#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 8))) (= |ULTIMATE.start_main_~i~0#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (not (= |ULTIMATE.start_main_~i~0#1.base| 0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:15,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:15,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-25 23:46:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439638850] [2022-11-25 23:46:15,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:46:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:46:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:46:15,822 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:16,345 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-25 23:46:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:46:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 23:46:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:16,347 INFO L225 Difference]: With dead ends: 41 [2022-11-25 23:46:16,347 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 23:46:16,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:46:16,349 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:16,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 182 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:46:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 23:46:16,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2022-11-25 23:46:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-11-25 23:46:16,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 18 [2022-11-25 23:46:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:16,356 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-11-25 23:46:16,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-11-25 23:46:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 23:46:16,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:16,358 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:16,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:16,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:16,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:16,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1102270109, now seen corresponding path program 2 times [2022-11-25 23:46:16,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:16,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829993569] [2022-11-25 23:46:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:17,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829993569] [2022-11-25 23:46:17,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829993569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034040393] [2022-11-25 23:46:17,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:46:17,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:17,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:17,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:17,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:46:17,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:46:17,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:17,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:46:17,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:17,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:17,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:17,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 23:46:17,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 23:46:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:17,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034040393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [725539885] [2022-11-25 23:46:17,428 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:46:17,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:17,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:17,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:17,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:17,510 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:46:17,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-25 23:46:17,552 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:17,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 109 [2022-11-25 23:46:17,780 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 292 [2022-11-25 23:46:17,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:18,512 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:18,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 300 treesize of output 336 [2022-11-25 23:46:18,597 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:18,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:18,701 INFO L321 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2022-11-25 23:46:18,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 267 [2022-11-25 23:46:18,847 INFO L321 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-25 23:46:18,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 277 [2022-11-25 23:46:18,923 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:18,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-25 23:46:18,983 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:46:18,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 23:46:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:19,068 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:19,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:20,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:20,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:20,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:20,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:21,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:21,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:21,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:21,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:21,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:21,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:21,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:21,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:21,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:21,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:21,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:21,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:21,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:22,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '596#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_main_~i~0#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 8))) (= |ULTIMATE.start_main_~i~0#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (not (= |ULTIMATE.start_main_~i~0#1.base| 0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:22,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:22,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:22,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-25 23:46:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085931432] [2022-11-25 23:46:22,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:46:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:46:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:46:22,167 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:22,323 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-11-25 23:46:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:46:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 23:46:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:22,324 INFO L225 Difference]: With dead ends: 57 [2022-11-25 23:46:22,324 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 23:46:22,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:46:22,325 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:22,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:46:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 23:46:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-25 23:46:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-11-25 23:46:22,331 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 21 [2022-11-25 23:46:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:22,332 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-11-25 23:46:22,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-11-25 23:46:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:46:22,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:22,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:22,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:22,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:22,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:22,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1992526231, now seen corresponding path program 3 times [2022-11-25 23:46:22,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:22,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739934422] [2022-11-25 23:46:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:22,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:23,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739934422] [2022-11-25 23:46:23,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739934422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:23,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282892729] [2022-11-25 23:46:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:46:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:23,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:23,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:46:23,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:46:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 23:46:23,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:23,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:23,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:23,675 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-25 23:46:23,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:46:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-25 23:46:23,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-25 23:46:23,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-11-25 23:46:23,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:23,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-25 23:46:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:23,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:23,877 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_302 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_302) |c_ULTIMATE.start_main_~l~0#1.base|))) (< (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) 1)))) is different from false [2022-11-25 23:46:23,945 WARN L837 $PredicateComparison]: unable to prove that (or |c_ULTIMATE.start_main_#t~short8#1| (forall ((v_ArrVal_297 Int) (v_ArrVal_296 Int) (v_ArrVal_302 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4))) (or (not (<= (select .cse0 .cse1) v_ArrVal_296)) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse0 (+ 8 |c_ULTIMATE.start_main_~i~0#1.offset|) v_ArrVal_297) .cse1 v_ArrVal_296)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset|) v_ArrVal_302) |c_ULTIMATE.start_main_~l~0#1.base|))) (< (select .cse2 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) 1))) (not (<= v_ArrVal_297 |c_ULTIMATE.start_main_~order~0#1|)))))) is different from false [2022-11-25 23:46:23,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 59 [2022-11-25 23:46:24,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:24,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 87 [2022-11-25 23:46:24,031 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:24,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 5 [2022-11-25 23:46:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-25 23:46:24,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282892729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:24,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030837955] [2022-11-25 23:46:24,213 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:46:24,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:24,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:24,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:24,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:24,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:24,317 INFO L321 Elim1Store]: treesize reduction 44, result has 43.6 percent of original size [2022-11-25 23:46:24,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 121 [2022-11-25 23:46:24,361 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:24,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:24,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:46:24,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:24,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:24,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:25,041 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:25,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:46:25,161 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:25,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:46:25,240 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:25,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:25,403 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-25 23:46:25,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 287 [2022-11-25 23:46:25,464 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:46:25,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 265 [2022-11-25 23:46:25,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:25,573 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:25,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:25,644 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:25,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:27,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:27,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:27,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:27,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:27,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:27,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:27,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:27,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:27,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:27,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:27,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:27,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:27,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:27,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:27,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:27,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:27,641 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:28,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '900#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_main_~i~0#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 8))) (= |ULTIMATE.start_main_~i~0#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (not (= |ULTIMATE.start_main_~i~0#1.base| 0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:28,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:28,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:28,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-11-25 23:46:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553578792] [2022-11-25 23:46:28,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 23:46:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 23:46:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=573, Unknown=2, NotChecked=98, Total=756 [2022-11-25 23:46:28,600 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:29,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:29,165 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-11-25 23:46:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:46:29,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-25 23:46:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:29,166 INFO L225 Difference]: With dead ends: 53 [2022-11-25 23:46:29,166 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 23:46:29,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=893, Unknown=2, NotChecked=126, Total=1190 [2022-11-25 23:46:29,168 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 163 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:29,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 181 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-11-25 23:46:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 23:46:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2022-11-25 23:46:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-11-25 23:46:29,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 25 [2022-11-25 23:46:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:29,181 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-11-25 23:46:29,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-11-25 23:46:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:46:29,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:29,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:29,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:29,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:46:29,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash -441117779, now seen corresponding path program 1 times [2022-11-25 23:46:29,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:29,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058210944] [2022-11-25 23:46:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:29,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:46:29,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058210944] [2022-11-25 23:46:29,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058210944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127274369] [2022-11-25 23:46:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:29,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:29,584 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:29,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:46:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:29,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:46:29,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:29,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:29,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-25 23:46:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:29,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:46:29,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127274369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760279155] [2022-11-25 23:46:29,867 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:46:29,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:29,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:29,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:29,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:29,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:29,949 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:29,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:29,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 109 [2022-11-25 23:46:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:30,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:46:30,173 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:30,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 292 [2022-11-25 23:46:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:30,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:30,703 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:30,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 31 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 300 treesize of output 336 [2022-11-25 23:46:30,798 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:30,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:30,942 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-25 23:46:30,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 287 [2022-11-25 23:46:31,005 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:46:31,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 265 [2022-11-25 23:46:31,077 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:31,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-25 23:46:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:31,158 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:31,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:31,209 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:46:31,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 23:46:32,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:32,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:32,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:32,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:32,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:32,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:32,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:32,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:32,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:32,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:32,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:32,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:32,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:32,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:32,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:32,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:32,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:33,057 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:33,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1207#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:33,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:33,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:33,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-11-25 23:46:33,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988370222] [2022-11-25 23:46:33,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:46:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:46:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:46:33,931 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:34,255 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-11-25 23:46:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:46:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-25 23:46:34,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:34,257 INFO L225 Difference]: With dead ends: 53 [2022-11-25 23:46:34,257 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 23:46:34,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:46:34,258 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:34,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 193 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:46:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 23:46:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-11-25 23:46:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-11-25 23:46:34,266 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 25 [2022-11-25 23:46:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:34,266 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-11-25 23:46:34,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-11-25 23:46:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:46:34,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:34,268 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:34,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:46:34,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -153461399, now seen corresponding path program 4 times [2022-11-25 23:46:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804379223] [2022-11-25 23:46:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:35,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:35,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804379223] [2022-11-25 23:46:35,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804379223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:35,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319303569] [2022-11-25 23:46:35,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:46:35,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:35,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:35,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:46:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-25 23:46:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:35,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:35,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:35,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:35,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:46:35,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:46:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:35,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:46:35,694 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:46:35,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-25 23:46:35,709 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-25 23:46:35,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:46:35,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 39 [2022-11-25 23:46:35,852 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:46:35,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 46 [2022-11-25 23:46:35,943 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-25 23:46:35,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2022-11-25 23:46:35,953 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:46:35,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-11-25 23:46:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:35,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:36,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:36,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2022-11-25 23:46:36,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:36,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 40 [2022-11-25 23:46:36,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:46:36,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:46:36,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:36,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-25 23:46:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:36,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-25 23:46:36,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:36,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-25 23:46:36,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:36,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-25 23:46:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:36,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319303569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [172173607] [2022-11-25 23:46:36,403 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:46:36,403 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:36,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:36,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:36,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:36,506 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:36,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:36,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:46:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 109 [2022-11-25 23:46:36,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:37,175 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:37,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:46:37,302 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:37,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:46:37,378 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:37,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:37,548 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-25 23:46:37,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 287 [2022-11-25 23:46:37,612 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:46:37,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 265 [2022-11-25 23:46:37,689 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:37,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-25 23:46:37,739 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:46:37,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 23:46:37,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:37,812 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:37,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:40,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:40,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:40,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:40,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:40,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:40,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:40,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:40,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:40,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:40,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:40,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:40,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:40,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:40,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:40,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:40,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:40,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:41,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1529#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_main_~i~0#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 8))) (= |ULTIMATE.start_main_~i~0#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (not (= |ULTIMATE.start_main_~i~0#1.base| 0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:41,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:41,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:41,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-25 23:46:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464244784] [2022-11-25 23:46:41,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:41,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:46:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:46:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:46:41,529 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:41,961 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2022-11-25 23:46:41,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:46:41,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-25 23:46:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:41,962 INFO L225 Difference]: With dead ends: 72 [2022-11-25 23:46:41,963 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 23:46:41,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:46:41,964 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:41,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:46:41,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 23:46:41,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-11-25 23:46:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 53 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-11-25 23:46:41,976 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 28 [2022-11-25 23:46:41,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:41,976 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-11-25 23:46:41,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-11-25 23:46:41,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:46:41,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:41,978 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:41,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:42,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:42,187 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:42,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1397947053, now seen corresponding path program 2 times [2022-11-25 23:46:42,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:42,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635541634] [2022-11-25 23:46:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:42,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:43,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635541634] [2022-11-25 23:46:43,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635541634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923962938] [2022-11-25 23:46:43,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:46:43,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:43,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:43,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:43,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:46:43,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:46:43,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 23:46:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:43,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:43,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:43,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:43,639 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-25 23:46:43,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:46:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:43,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-25 23:46:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:43,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2022-11-25 23:46:43,891 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:46:43,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 90 [2022-11-25 23:46:43,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2022-11-25 23:46:43,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2022-11-25 23:46:44,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2022-11-25 23:46:44,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-11-25 23:46:44,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:44,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-25 23:46:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:44,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:44,282 INFO L321 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-11-25 23:46:44,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1831 treesize of output 1526 [2022-11-25 23:46:44,680 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_701 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_701) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) |c_ULTIMATE.start_main_~i~0#1.base|)) (forall ((v_ArrVal_703 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_703) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) |c_ULTIMATE.start_main_~i~0#1.offset|))) is different from false [2022-11-25 23:46:44,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:44,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2022-11-25 23:46:44,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-25 23:46:44,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-25 23:46:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-25 23:46:44,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923962938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:44,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770558958] [2022-11-25 23:46:44,925 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:46:44,925 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:44,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:44,926 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:44,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:44,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:44,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:44,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:45,016 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:45,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:45,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:46:45,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:45,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 109 [2022-11-25 23:46:45,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:45,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:45,721 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:45,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:46:45,850 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:45,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:46:45,922 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:45,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:46,010 INFO L321 Elim1Store]: treesize reduction 54, result has 27.0 percent of original size [2022-11-25 23:46:46,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 267 [2022-11-25 23:46:46,129 INFO L321 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-11-25 23:46:46,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 262 treesize of output 277 [2022-11-25 23:46:46,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:46,236 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:46,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:46,303 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:46,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:47,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:47,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:47,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:47,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:47,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:47,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:47,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:47,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:47,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:47,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:47,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:47,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:48,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:48,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:48,086 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:49,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1916#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:49,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:49,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:49,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-25 23:46:49,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573449403] [2022-11-25 23:46:49,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:49,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:46:49,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:46:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=884, Unknown=1, NotChecked=60, Total=1056 [2022-11-25 23:46:49,116 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:50,015 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2022-11-25 23:46:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:46:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-25 23:46:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:50,017 INFO L225 Difference]: With dead ends: 67 [2022-11-25 23:46:50,017 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 23:46:50,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=233, Invalid=1409, Unknown=2, NotChecked=78, Total=1722 [2022-11-25 23:46:50,018 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:50,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 332 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 35 Unchecked, 0.6s Time] [2022-11-25 23:46:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 23:46:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-11-25 23:46:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-11-25 23:46:50,028 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 28 [2022-11-25 23:46:50,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:50,028 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-11-25 23:46:50,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-11-25 23:46:50,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 23:46:50,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:50,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:50,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 23:46:50,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:50,235 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:50,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2015754845, now seen corresponding path program 5 times [2022-11-25 23:46:50,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:50,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027279933] [2022-11-25 23:46:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:50,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:52,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027279933] [2022-11-25 23:46:52,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027279933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199553416] [2022-11-25 23:46:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:46:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:52,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:52,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:46:53,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:46:53,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 23:46:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:53,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:53,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:53,174 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:46:53,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:46:53,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:46:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:53,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 23:46:53,242 INFO L321 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2022-11-25 23:46:53,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2022-11-25 23:46:53,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:46:53,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-25 23:46:53,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:53,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:53,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:53,432 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:46:53,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 40 [2022-11-25 23:46:53,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-11-25 23:46:53,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:53,521 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:46:53,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-25 23:46:53,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-11-25 23:46:53,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-11-25 23:46:53,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:53,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-25 23:46:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:53,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:53,640 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_906 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_906) |c_ULTIMATE.start_main_~l~0#1.base|))) (< (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) 1)))) is different from false [2022-11-25 23:46:53,659 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int)) (v_ArrVal_906 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_901) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset|) v_ArrVal_906) |c_ULTIMATE.start_main_~l~0#1.base|))) (< (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4)) 1)))) is different from false [2022-11-25 23:46:53,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:53,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 119 [2022-11-25 23:46:53,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:53,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 217 treesize of output 241 [2022-11-25 23:46:53,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 174 [2022-11-25 23:46:53,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2022-11-25 23:46:54,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:54,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 35 [2022-11-25 23:46:54,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:46:54,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:46:54,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-25 23:46:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:54,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-25 23:46:54,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-25 23:46:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-11-25 23:46:54,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199553416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:54,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070907291] [2022-11-25 23:46:54,272 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:46:54,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:54,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:54,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:54,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:54,338 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:46:54,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:46:54,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:46:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 109 [2022-11-25 23:46:54,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:54,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:46:55,028 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:46:55,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:46:55,125 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:55,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:46:55,192 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:46:55,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:46:55,323 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-25 23:46:55,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 287 [2022-11-25 23:46:55,379 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:46:55,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 265 [2022-11-25 23:46:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:55,498 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:55,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:55,560 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:46:55,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:46:56,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:56,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:56,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:56,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:57,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:46:57,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:46:57,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:57,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:57,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:46:57,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:57,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:57,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:46:57,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:46:57,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:57,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:57,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:57,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:57,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:57,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:46:57,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:57,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:46:57,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:58,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2310#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_main_~i~0#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 8))) (= |ULTIMATE.start_main_~i~0#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (not (= |ULTIMATE.start_main_~i~0#1.base| 0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:46:58,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:58,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:58,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-25 23:46:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492876163] [2022-11-25 23:46:58,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:58,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:46:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:46:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=828, Unknown=4, NotChecked=118, Total=1056 [2022-11-25 23:46:58,315 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:59,333 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2022-11-25 23:46:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:46:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 23:46:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:59,334 INFO L225 Difference]: With dead ends: 61 [2022-11-25 23:46:59,334 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 23:46:59,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=261, Invalid=1465, Unknown=4, NotChecked=162, Total=1892 [2022-11-25 23:46:59,335 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:59,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 193 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 5 Unknown, 96 Unchecked, 0.4s Time] [2022-11-25 23:46:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 23:46:59,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-11-25 23:46:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-11-25 23:46:59,346 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 32 [2022-11-25 23:46:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:59,346 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-11-25 23:46:59,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-11-25 23:46:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:46:59,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:59,348 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:59,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:59,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:46:59,555 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:59,555 INFO L85 PathProgramCache]: Analyzing trace with hash -667366417, now seen corresponding path program 6 times [2022-11-25 23:46:59,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:59,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070335846] [2022-11-25 23:46:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:59,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:01,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:01,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070335846] [2022-11-25 23:47:01,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070335846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:01,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361683680] [2022-11-25 23:47:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:47:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:01,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:01,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:47:02,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:47:02,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-25 23:47:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:02,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:02,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:47:02,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:47:02,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:02,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 23:47:02,340 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:47:02,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-25 23:47:02,363 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-25 23:47:02,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-25 23:47:02,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:02,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2022-11-25 23:47:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,481 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-25 23:47:02,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2022-11-25 23:47:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,492 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-25 23:47:02,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-11-25 23:47:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 57 [2022-11-25 23:47:02,695 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:47:02,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 67 [2022-11-25 23:47:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,806 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-25 23:47:02,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 127 [2022-11-25 23:47:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:02,833 INFO L321 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2022-11-25 23:47:02,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 97 [2022-11-25 23:47:02,969 INFO L321 Elim1Store]: treesize reduction 85, result has 11.5 percent of original size [2022-11-25 23:47:02,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 132 treesize of output 74 [2022-11-25 23:47:02,987 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-25 23:47:02,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 25 [2022-11-25 23:47:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:02,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:04,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:04,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 192 [2022-11-25 23:47:04,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 156 [2022-11-25 23:47:04,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 4 [2022-11-25 23:47:04,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 4 [2022-11-25 23:47:04,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:04,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 164 [2022-11-25 23:47:04,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:04,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 152 [2022-11-25 23:47:05,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:05,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 89 [2022-11-25 23:47:05,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:05,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:47:05,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:05,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 8 [2022-11-25 23:47:05,304 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 23:47:05,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2022-11-25 23:47:05,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-11-25 23:47:05,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:05,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 89 [2022-11-25 23:47:05,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:05,335 INFO L321 Elim1Store]: treesize reduction 32, result has 11.1 percent of original size [2022-11-25 23:47:05,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1204 treesize of output 1138 [2022-11-25 23:47:05,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:05,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1130 treesize of output 780 [2022-11-25 23:47:05,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:05,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 420 treesize of output 414 [2022-11-25 23:47:05,375 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:47:05,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 776 treesize of output 638 [2022-11-25 23:47:05,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2022-11-25 23:47:05,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2022-11-25 23:47:05,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2022-11-25 23:47:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:05,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361683680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077167034] [2022-11-25 23:47:05,412 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:47:05,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:47:05,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:47:05,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:47:05,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:47:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:05,487 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:47:05,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:47:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 109 [2022-11-25 23:47:05,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-25 23:47:05,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:05,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:05,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:06,300 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:47:06,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:47:06,421 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:47:06,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:47:06,486 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:47:06,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:47:06,626 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-25 23:47:06,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 287 [2022-11-25 23:47:06,695 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:47:06,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 265 [2022-11-25 23:47:06,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:06,803 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:47:06,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:47:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:06,877 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:47:06,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:47:08,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:47:08,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:08,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:08,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:47:08,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:08,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:08,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:08,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:08,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:47:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:08,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:47:08,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:08,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:08,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:47:08,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:47:08,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:08,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:08,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:47:08,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:08,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:08,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:47:10,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2724#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_main_~i~0#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 4)) (select (select |#memory_int| |ULTIMATE.start_main_~i~0#1.base|) (+ |ULTIMATE.start_main_~i~0#1.offset| 8))) (= |ULTIMATE.start_main_~i~0#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (not (= |ULTIMATE.start_main_~i~0#1.base| 0)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:47:10,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:47:10,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:47:10,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-25 23:47:10,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513619414] [2022-11-25 23:47:10,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:10,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:47:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:47:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:47:10,196 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:12,484 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2022-11-25 23:47:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:47:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-25 23:47:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:12,485 INFO L225 Difference]: With dead ends: 99 [2022-11-25 23:47:12,485 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 23:47:12,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:47:12,486 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 86 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:12,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 392 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:47:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 23:47:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-11-25 23:47:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 70 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2022-11-25 23:47:12,504 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 35 [2022-11-25 23:47:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:12,505 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2022-11-25 23:47:12,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2022-11-25 23:47:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:47:12,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:12,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:12,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 23:47:12,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:12,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:47:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash 884042035, now seen corresponding path program 3 times [2022-11-25 23:47:12,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:12,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496982687] [2022-11-25 23:47:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:14,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496982687] [2022-11-25 23:47:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496982687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:14,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745572058] [2022-11-25 23:47:14,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:47:14,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:14,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:14,271 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:14,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:47:14,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:47:14,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:14,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 23:47:14,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:14,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:14,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:47:14,700 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-25 23:47:14,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-25 23:47:14,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:47:14,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:14,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-25 23:47:14,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:14,769 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-25 23:47:14,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-11-25 23:47:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:14,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:14,927 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:47:14,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-11-25 23:47:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:14,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-25 23:47:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:15,100 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:47:15,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 121 [2022-11-25 23:47:15,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2022-11-25 23:47:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:15,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-11-25 23:47:15,222 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-25 23:47:15,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 95 [2022-11-25 23:47:15,236 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 23:47:15,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 72 [2022-11-25 23:47:15,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:15,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-11-25 23:47:15,384 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 23:47:15,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 42 [2022-11-25 23:47:15,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2022-11-25 23:47:15,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:15,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-25 23:47:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:15,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:15,611 WARN L837 $PredicateComparison]: unable to prove that (or |c_ULTIMATE.start_main_#t~short8#1| (forall ((v_ArrVal_1348 (Array Int Int)) (v_ArrVal_1344 Int) (v_ArrVal_1347 Int) (v_ArrVal_1352 (Array Int Int)) (v_ArrVal_1346 Int) (v_ArrVal_1351 (Array Int Int)) (v_ArrVal_1349 Int) (v_ArrVal_1350 (Array Int Int))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4))) (or (not (<= (select .cse0 .cse1) v_ArrVal_1349)) (not (<= v_ArrVal_1347 |c_ULTIMATE.start_main_~order~0#1|)) (let ((.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|))) (let ((.cse4 (select .cse6 |c_ULTIMATE.start_main_~i~0#1.offset|))) (let ((.cse2 (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~i~0#1.offset|))) (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse0 .cse5 v_ArrVal_1347) .cse1 v_ArrVal_1349)) .cse4 v_ArrVal_1350) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse6 .cse5 v_ArrVal_1344) .cse1 v_ArrVal_1346)) .cse4 v_ArrVal_1351) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)))) (.cse3 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_1348) .cse4 v_ArrVal_1352) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (< (select .cse2 (+ .cse3 8)) (+ (select .cse2 (+ .cse3 4)) 1))))))))) is different from false [2022-11-25 23:47:15,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:15,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 139 [2022-11-25 23:47:15,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:15,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 327 [2022-11-25 23:47:15,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 39 [2022-11-25 23:47:15,846 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|))) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~i~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4)) (.cse0 (select .cse1 |c_ULTIMATE.start_main_~i~0#1.offset|))) (and (forall ((v_ArrVal_1344 Int) (v_ArrVal_1346 Int) (v_ArrVal_1351 (Array Int Int))) (not (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse1 .cse2 v_ArrVal_1344) .cse3 v_ArrVal_1346)) .cse0 v_ArrVal_1351) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)))) (forall ((v_ArrVal_1348 (Array Int Int)) (v_ArrVal_1352 (Array Int Int))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_1348) .cse0 v_ArrVal_1352) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (or (= (+ .cse4 4) |c_ULTIMATE.start_main_~i~0#1.offset|) (= .cse4 |c_ULTIMATE.start_main_~i~0#1.offset|)))) (forall ((v_ArrVal_1348 (Array Int Int)) (v_ArrVal_1352 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_1348) .cse0 v_ArrVal_1352) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) |c_ULTIMATE.start_main_~i~0#1.offset|)) (forall ((v_ArrVal_1344 Int) (v_ArrVal_1346 Int) (v_ArrVal_1351 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse1 .cse2 v_ArrVal_1344) .cse3 v_ArrVal_1346)) .cse0 v_ArrVal_1351) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|) |c_ULTIMATE.start_main_~i~0#1.base|)) (forall ((v_ArrVal_1348 (Array Int Int)) (v_ArrVal_1352 (Array Int Int))) (let ((.cse5 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_1348) .cse0 v_ArrVal_1352) |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (or (= .cse5 .cse3) (= .cse5 |c_ULTIMATE.start_main_~i~0#1.offset|))))))) is different from false [2022-11-25 23:47:21,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:21,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 137 [2022-11-25 23:47:22,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:22,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 138 [2022-11-25 23:47:22,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 128 [2022-11-25 23:47:22,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2022-11-25 23:47:22,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2022-11-25 23:47:22,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-25 23:47:22,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 4 [2022-11-25 23:47:22,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:22,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 61 [2022-11-25 23:47:22,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:22,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 27 [2022-11-25 23:47:22,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 23:47:22,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-11-25 23:47:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-25 23:47:22,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745572058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:22,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516767479] [2022-11-25 23:47:22,802 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 23:47:22,802 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:47:22,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:47:22,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:47:22,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:47:22,908 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:47:22,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-25 23:47:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:22,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:23,040 INFO L321 Elim1Store]: treesize reduction 44, result has 43.6 percent of original size [2022-11-25 23:47:23,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 30 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 121 [2022-11-25 23:47:23,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:23,165 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:47:23,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-25 23:47:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:23,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:23,891 INFO L321 Elim1Store]: treesize reduction 478, result has 16.1 percent of original size [2022-11-25 23:47:23,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 304 treesize of output 340 [2022-11-25 23:47:24,011 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:47:24,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 274 [2022-11-25 23:47:24,101 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:47:24,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 270 [2022-11-25 23:47:24,288 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-25 23:47:24,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 264 treesize of output 287 [2022-11-25 23:47:24,381 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-25 23:47:24,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 265 [2022-11-25 23:47:24,475 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-25 23:47:24,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-25 23:47:24,555 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 23:47:24,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-25 23:47:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:24,668 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-25 23:47:24,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 54 [2022-11-25 23:47:26,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:47:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:47:26,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:26,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-25 23:47:26,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2022-11-25 23:47:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:26,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:26,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:26,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:26,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-25 23:47:26,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:26,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:47:26,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:26,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:27,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-25 23:47:27,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:27,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-25 23:47:27,131 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:47:29,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~l~0#1.offset|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:47:29,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:47:29,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:47:29,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-11-25 23:47:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568143353] [2022-11-25 23:47:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 23:47:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 23:47:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1120, Unknown=17, NotChecked=138, Total=1406 [2022-11-25 23:47:29,033 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:35,887 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2022-11-25 23:47:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:47:35,888 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-25 23:47:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:35,889 INFO L225 Difference]: With dead ends: 93 [2022-11-25 23:47:35,889 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 23:47:35,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=305, Invalid=1847, Unknown=18, NotChecked=182, Total=2352 [2022-11-25 23:47:35,891 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 180 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:35,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 435 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 371 Invalid, 0 Unknown, 117 Unchecked, 3.5s Time] [2022-11-25 23:47:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 23:47:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2022-11-25 23:47:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2022-11-25 23:47:35,907 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 35 [2022-11-25 23:47:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:35,907 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2022-11-25 23:47:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2022-11-25 23:47:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 23:47:35,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:35,909 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:35,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:36,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:47:36,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:47:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash -239297629, now seen corresponding path program 4 times [2022-11-25 23:47:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466438825] [2022-11-25 23:47:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:36,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:39,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466438825] [2022-11-25 23:47:39,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466438825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732559994] [2022-11-25 23:47:39,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:47:39,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:39,095 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:39,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ab97e06-1252-4f3a-ab0d-6e8cf047f075/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:47:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-25 23:47:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:39,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 23:47:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:39,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 23:47:39,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:47:39,461 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-25 23:47:39,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-25 23:47:39,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 23:47:39,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:47:39,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:39,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2022-11-25 23:47:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:39,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-25 23:47:39,688 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-25 23:47:39,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2022-11-25 23:47:39,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:39,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 23:47:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:39,747 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-25 23:47:39,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-11-25 23:47:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-25 23:47:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,142 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:47:40,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 58 [2022-11-25 23:47:40,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-25 23:47:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,386 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 23:47:40,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 120 [2022-11-25 23:47:40,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:47:40,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,457 INFO L321 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2022-11-25 23:47:40,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 79 [2022-11-25 23:47:40,955 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-25 23:47:40,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 151 [2022-11-25 23:47:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:40,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 60 [2022-11-25 23:47:40,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:47:40,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 92 [2022-11-25 23:47:41,571 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-25 23:47:41,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 76 [2022-11-25 23:47:41,584 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-25 23:47:41,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-11-25 23:47:41,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:41,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2022-11-25 23:47:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:41,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:42,478 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1570 Int) (v_ArrVal_1561 Int) (v_ArrVal_1567 (Array Int Int)) (v_ArrVal_1571 Int) (v_ArrVal_1562 Int) (v_ArrVal_1565 Int) (v_ArrVal_1563 (Array Int Int)) (v_ArrVal_1564 Int) (v_ArrVal_1573 (Array Int Int))) (let ((.cse12 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|)) (.cse15 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base|))) (let ((.cse9 (select .cse15 |c_ULTIMATE.start_main_~i~0#1.offset|)) (.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_1563)) (.cse7 (select .cse12 |c_ULTIMATE.start_main_~i~0#1.offset|))) (let ((.cse8 (select .cse6 .cse7)) (.cse10 (+ 4 .cse9))) (let ((.cse0 (select .cse8 .cse10))) (or (< .cse0 v_ArrVal_1571) (let ((.cse13 (+ 8 |c_ULTIMATE.start_main_~i~0#1.offset|)) (.cse14 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4))) (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse15 .cse13 v_ArrVal_1564) .cse14 v_ArrVal_1565)) .cse7 v_ArrVal_1573)) (.cse11 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse12 .cse13 v_ArrVal_1561) .cse14 v_ArrVal_1562)) .cse7 v_ArrVal_1567))) (let ((.cse4 (select (select .cse11 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse5 (select (select .cse3 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse1 (select (store .cse6 .cse7 (store (store .cse8 (+ 8 .cse9) v_ArrVal_1571) .cse10 v_ArrVal_1570)) (select (select .cse11 .cse4) .cse5))) (.cse2 (select (select .cse3 .cse4) .cse5))) (< (select .cse1 (+ 8 .cse2)) (+ 1 (select .cse1 (+ 4 .cse2)))))))) (not (<= .cse0 v_ArrVal_1570)) (< .cse0 0))))))) is different from false [2022-11-25 23:47:42,798 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1567 (Array Int Int)) (v_ArrVal_1563 (Array Int Int)) (v_ArrVal_1573 (Array Int Int)) (v_ArrVal_1551 (Array Int Int)) (v_ArrVal_1570 Int) (v_ArrVal_1561 Int) (v_ArrVal_1571 Int) (v_ArrVal_1552 Int) (v_ArrVal_1562 Int) (v_ArrVal_1565 Int) (v_ArrVal_1554 Int) (v_ArrVal_1564 Int) (v_ArrVal_1556 Int) (v_ArrVal_1555 Int)) (let ((.cse21 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base|)) (.cse20 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base|)) (.cse22 (+ 8 |c_ULTIMATE.start_main_~i~0#1.offset|)) (.cse23 (+ |c_ULTIMATE.start_main_~i~0#1.offset| 4))) (let ((.cse17 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse20 .cse22 v_ArrVal_1555) .cse23 v_ArrVal_1556))) (.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~i~0#1.base| (store (store .cse21 .cse22 v_ArrVal_1552) .cse23 v_ArrVal_1554))) (.cse13 (select .cse21 |c_ULTIMATE.start_main_~i~0#1.offset|))) (let ((.cse14 (select .cse12 .cse13)) (.cse18 (select .cse17 .cse13)) (.cse19 (select .cse20 |c_ULTIMATE.start_main_~i~0#1.offset|))) (let ((.cse9 (select .cse18 .cse19)) (.cse6 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| v_ArrVal_1551) .cse13 v_ArrVal_1563)) (.cse7 (select .cse14 .cse19))) (let ((.cse8 (select .cse6 .cse7)) (.cse10 (+ .cse9 4))) (let ((.cse0 (select .cse8 .cse10))) (or (not (<= .cse0 v_ArrVal_1570)) (let ((.cse15 (+ 8 .cse19)) (.cse16 (+ 4 .cse19))) (let ((.cse3 (store (store .cse17 .cse13 (store (store .cse18 .cse15 v_ArrVal_1564) .cse16 v_ArrVal_1565)) .cse7 v_ArrVal_1573)) (.cse11 (store (store .cse12 .cse13 (store (store .cse14 .cse15 v_ArrVal_1561) .cse16 v_ArrVal_1562)) .cse7 v_ArrVal_1567))) (let ((.cse4 (select (select .cse11 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse5 (select (select .cse3 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse1 (select (store .cse6 .cse7 (store (store .cse8 (+ .cse9 8) v_ArrVal_1571) .cse10 v_ArrVal_1570)) (select (select .cse11 .cse4) .cse5))) (.cse2 (select (select .cse3 .cse4) .cse5))) (< (select .cse1 (+ 8 .cse2)) (+ (select .cse1 (+ .cse2 4)) 1)))))) (< .cse0 0) (< .cse0 v_ArrVal_1571))))))))) is different from false [2022-11-25 23:47:43,385 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1567 (Array Int Int)) (v_ArrVal_1563 (Array Int Int)) (v_ArrVal_1573 (Array Int Int)) (v_ArrVal_1551 (Array Int Int)) (v_ArrVal_1570 Int) (v_ArrVal_1561 Int) (v_ArrVal_1571 Int) (v_ArrVal_1552 Int) (v_ArrVal_1562 Int) (v_ArrVal_1565 Int) (v_ArrVal_1554 Int) (v_ArrVal_1564 Int) (v_ArrVal_1556 Int) (v_ArrVal_1555 Int)) (let ((.cse21 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~l~0#1.base|)) (.cse20 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~l~0#1.base|)) (.cse22 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (.cse23 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))) (let ((.cse17 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~l~0#1.base| (store (store .cse20 .cse22 v_ArrVal_1555) .cse23 v_ArrVal_1556))) (.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~l~0#1.base| (store (store .cse21 .cse22 v_ArrVal_1552) .cse23 v_ArrVal_1554))) (.cse13 (select .cse21 |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse14 (select .cse12 .cse13)) (.cse18 (select .cse17 .cse13)) (.cse19 (select .cse20 |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse9 (select .cse18 .cse19)) (.cse6 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~l~0#1.base| v_ArrVal_1551) .cse13 v_ArrVal_1563)) (.cse7 (select .cse14 .cse19))) (let ((.cse8 (select .cse6 .cse7)) (.cse10 (+ .cse9 4))) (let ((.cse0 (select .cse8 .cse10))) (or (not (<= .cse0 v_ArrVal_1570)) (< .cse0 v_ArrVal_1571) (< .cse0 0) (let ((.cse15 (+ 8 .cse19)) (.cse16 (+ .cse19 4))) (let ((.cse3 (store (store .cse17 .cse13 (store (store .cse18 .cse15 v_ArrVal_1564) .cse16 v_ArrVal_1565)) .cse7 v_ArrVal_1573)) (.cse11 (store (store .cse12 .cse13 (store (store .cse14 .cse15 v_ArrVal_1561) .cse16 v_ArrVal_1562)) .cse7 v_ArrVal_1567))) (let ((.cse4 (select (select .cse11 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse5 (select (select .cse3 |c_ULTIMATE.start_main_~l~0#1.base|) |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse1 (select (store .cse6 .cse7 (store (store .cse8 (+ .cse9 8) v_ArrVal_1571) .cse10 v_ArrVal_1570)) (select (select .cse11 .cse4) .cse5))) (.cse2 (select (select .cse3 .cse4) .cse5))) (< (select .cse1 (+ 8 .cse2)) (+ (select .cse1 (+ 4 .cse2)) 1)))))))))))))) is different from false [2022-11-25 23:47:44,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:44,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1086 treesize of output 933 [2022-11-25 23:47:44,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:44,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 915 treesize of output 654 [2022-11-25 23:47:44,468 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_35 (Array Int Int)) (v_ArrVal_1567 (Array Int Int)) (v_arrayElimArr_36 (Array Int Int)) (v_ArrVal_1563 (Array Int Int)) (v_ArrVal_1573 (Array Int Int)) (v_ArrVal_1551 (Array Int Int)) (v_ArrVal_1570 Int) (v_ArrVal_1561 Int) (v_ArrVal_1571 Int) (v_ArrVal_1562 Int) (v_ArrVal_1565 Int) (|v_ULTIMATE.start_main_~l~0#1.base_78| Int) (v_ArrVal_1564 Int)) (let ((.cse15 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~l~0#1.base_78| v_arrayElimArr_35)) (.cse11 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~l~0#1.base_78| v_arrayElimArr_36))) (let ((.cse12 (select .cse11 |c_ULTIMATE.start_main_~l~0#1.base|)) (.cse16 (select .cse15 |c_ULTIMATE.start_main_~l~0#1.base|))) (let ((.cse8 (select .cse16 |c_ULTIMATE.start_main_~l~0#1.offset|)) (.cse5 (store (store |c_#memory_int| |v_ULTIMATE.start_main_~l~0#1.base_78| v_ArrVal_1551) |c_ULTIMATE.start_main_~l~0#1.base| v_ArrVal_1563)) (.cse6 (select .cse12 |c_ULTIMATE.start_main_~l~0#1.offset|))) (let ((.cse7 (select .cse5 .cse6)) (.cse9 (+ .cse8 4))) (let ((.cse17 (select .cse7 .cse9))) (or (let ((.cse13 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 8)) (.cse14 (+ |c_ULTIMATE.start_main_~l~0#1.offset| 4))) (let ((.cse2 (store (store .cse15 |c_ULTIMATE.start_main_~l~0#1.base| (store (store .cse16 .cse13 v_ArrVal_1564) .cse14 v_ArrVal_1565)) .cse6 v_ArrVal_1573)) (.cse10 (store (store .cse11 |c_ULTIMATE.start_main_~l~0#1.base| (store (store .cse12 .cse13 v_ArrVal_1561) .cse14 v_ArrVal_1562)) .cse6 v_ArrVal_1567))) (let ((.cse3 (select (select .cse10 |v_ULTIMATE.start_main_~l~0#1.base_78|) 0)) (.cse4 (select (select .cse2 |v_ULTIMATE.start_main_~l~0#1.base_78|) 0))) (let ((.cse0 (select (store .cse5 .cse6 (store (store .cse7 (+ 8 .cse8) v_ArrVal_1571) .cse9 v_ArrVal_1570)) (select (select .cse10 .cse3) .cse4))) (.cse1 (select (select .cse2 .cse3) .cse4))) (< (select .cse0 (+ .cse1 8)) (+ (select .cse0 (+ .cse1 4)) 1)))))) (< .cse17 v_ArrVal_1571) (< .cse17 0) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~l~0#1.base_78|) 0)) (not (= (select v_arrayElimArr_35 0) |c_ULTIMATE.start_main_~l~0#1.offset|)) (not (<= .cse17 v_ArrVal_1570)) (not (= (select v_arrayElimArr_36 0) |c_ULTIMATE.start_main_~l~0#1.base|))))))))) is different from false [2022-11-25 23:47:44,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:44,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1485 treesize of output 1123 [2022-11-25 23:47:44,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:44,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:44,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12274 treesize of output 11414 [2022-11-25 23:47:45,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:45,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 11427 treesize of output 9199 [2022-11-25 23:47:45,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:45,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 9170 treesize of output 6898 [2022-11-25 23:47:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:47:45,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:45,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41522 treesize of output 38992 [2022-11-25 23:47:45,522 INFO L321 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2022-11-25 23:47:45,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38982 treesize of output 32804 [2022-11-25 23:47:45,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:45,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32107 treesize of output 30659 [2022-11-25 23:47:45,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:45,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30644 treesize of output 29164 [2022-11-25 23:47:46,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:47:46,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28294 treesize of output 28174